Beetle - A Mini Arduino Leonardo-Compatible Microcontroller, ATmega32U4

Made my smallest K3NG, using the Beetle as its heart. I only had to change which pins were input/output and nothing else in the code for the upload to take and work first shot. It doesn't have as much memory space as a full Arduino Nano, but the SDA and SCL pins are better marked, as are the VCC and GND pads. The pads are big, and easy to solder, overall even better than the old Digispark boards.

It's tiny, it's inexpensive, and it works with the Sketch I made with an actual Leonardo. I keep it stored in a case meant for earplugs when not in use. Arduino IDE sees it as a Leonardo, everything works as a Leonardo. Splendid

This seems to be a nice little Arduino Leonardo compatible board. Compact size. It has an attractive price. Like other Leonardo board is connects as a HID. Programming is through the normal Arduino IDE.

I love the PCB design. It gives an amazing variability to installation. I am not happy about having to reset the PC interface every third connection. (Leonardo issue) The pins are just what you need for a compact project. The PCB only has pads for 3 digital and 3 analog, or 6 digital. If you need more than that you need a different chip with more memory. The duel set of power pads is very handy. Communications pins are easy to solder to. Over all, very nice device. I will buy more.

I bought a couple of these for a mini device I was building for fun. It is so small and cute and works perfectly with Arduino code, just upload and go! It also powers perfectly from any USB 5V phone battery pack! The device I built is proprietary, but dealt with converting stings of data into wireless signals! These little things worked perfectly and so well priced for it's ability!

These are nice, small arduino boards that are great for projects that don’t require a lot of I/O pins. They have a nonstandard pin layout, but they can still be used on a breadboard by removing every other pin on strips of header pins

The third time I inserted the USB cable the USB jack popped right off the board! On inspection, one of the mounting pins was not even soldered on! This may be a random defect so I've had them replace it. I will certainly add some solder when the new one arrives as this really messed up my project timing! And in 40 years of electronics I've never had this happen. QA people!! Update 11/26/23 The replacement also had NO SOLDER on the USB main mounting pins! Without this the only thing holding the jack onto PCB are the data pins and that's not acceptable. Since we are using this for a joint DIY project I've recommended to all our participants that they solder the main two pins the minute they get the board. That way there should be no problem as these pins are direct to ground anyway and if anything help ensure that any stray capacitance is routed to ground as well. BTW - Even though all of ours have functioned perfectly since having made the above mods, I claim no responsibility for your soldering or the functioning of the device after you have done so. It is entirely your risk and you take total responsibility if you decide to go forward and you should be able to identify and understand the part referenced and have some electronics knowledge before doing so.

Works like a charm -- and given the size, charm is a good word. In the attached photo, if you can even see the Beetle, compare it to the size of a USB connector or alligator clip. If the pinout is enough for your project, the size is quite appealing. In the toy I'm making, the LiPo battery is bigger than the PowerBoost 500 charger, which is bigger than the Beetle, so everything snuggles nicely in a small space. Arduino compatible, just select Leonardo as the board type in the IDE.

Perfecto para proyectos dónde se requiere poco espacio y algunas funciones sencillas

I'm using 5 of these in single lever, 3D printed train driving simulator controllers i've made. These program the same as an arduino leonardo, which means you can use them as a HID joystick or keyboard with no messing about. I use mine to read potentiometer and switch positions, and send keystrokes to a simulator that does not accept joystick inputs yet. This is where i needed a board that does the HID stuff, and also i didn't want a large board where i would only be using 1 or 2 of the inputs, and having 20 or so wasted inputs.

La compacité de cet arduino est impressionnante, tout en restant "humaine". La documentation est relativement difficile à trouver pour ce modèle spécifique. Le constructeur dit que c'est compatible 'Leonardo', mais on voit bien que ce n'est physiquement pas identique, qu'il n'y a pas le même nombre de connecteurs et il y a aussi des limitations en terme de broches qui gèrent les interruptions (et comme ce n'est pas clairement documenté, c'est difficile à confirmer / tester / utiliser). Sinon une simple connexion USB permet de commencer à s'amuser sur des montages simples. Petit "truc" pour le cas où cela vous arriverait: La perte de la communication série avec l'Arduino n'est pas toujours résolue en débranchant / rebranchant à l'USB. Dans ce cas, redémarrer le PC et ça fonctionne à nouveau (ça m'a fait le coup plusieurs fois).

Facile d'utilisation.compatible avec arduino et ses bibilotheques.

Sehr guter, kompakter Arduino. Sonst wie gewohnt.